New Empirical Indoor Path Loss Model using Active UHF-RFID Tags for Localization Purposes

Indoor is one of the most complicated propagation environments depending on the specific type of buildings structure. In this paper, we present a combination of 2 models using active UHF-RFID tags at 433 MHz: The Dual One Slope Model (DOSM) and the Dual One Slope with Second Order Polynomial Model (DOSSOM). Further, a comparison with different propagation models have been proposed. Our work aims to study, analyze and improve the accuracy of the two new path loss models. Distance errors are determined based on all different propagation models. According to experimental validations, the mean distance error had a value 56 cm using the DOSM, whereas, it had a value of 51 cm using the DOSSOM. In short, distance errors derived from the two new empirical path loss models (DOSM and DOSSOM) closely match real measurements. Thus, referring to the mean distance errors already reached, the stability of our new indoor propagation models will be affirmed.